A bitmap (raster image) used in a texture mapping process.

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1answer
452 views

Sphere Texture Mapping shows visible seams

As you can see from the above picture there is a visible seam in the texture mapping. The underlying mesh is a geosphere based on octahedron subdivisions. On that particular latitude, vertices have ...
10
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3answers
4k views

Premultiplied alpha, yea or nay?

Should I be using premultiplied alpha? Reading Tom Forsyth's article it seems a nobrainer. Premultiplied alpha (AKA additive blending) is superior in every sense. However, premultiplied alpha seems ...
5
votes
2answers
855 views

Is there a tool to automatically pack individual textures into one big png?

I'm currently working on a texture pack for minecraft (but this question is not restricted to that). All terrain textures are squared and stored in one big terrain.png. (FYI that's from Glimmar's ...
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1answer
1k views

Computing uv coordinates on a sphere approximated from an octahedron

Right now I'm texturing the octahedron with the formular from wikipedia(Finding UV on a sphere): UV Coordinates Wikipedia That unfortunately leads to heavy distortion right at the beginning, which of ...
1
vote
1answer
433 views

XNA - Drawing zoomed 2D sprites

I have a tile based game. Each tile texture is loaded and then I draw each one next to the other, forming a continuous background. I actually followed this tutorial for the xml files. http://www....
4
votes
5answers
1k views

XNA 2D Spritesheet drawing rendering problem

I'm making a tile-based game, using one spritesheet containing all tile graphics. Each tile has a size of 32x32 pixels. The main problem is: when I draw the tile to the screen, if the tile position ...
0
votes
0answers
109 views

Unity and ASTC support

I have configured in unity all compressed diffuse map textures as 6x6 ASTC blocks and normals and other maps as 4x4 blocks. However when I profile my game using Mali Graphics Debugger it tells me ...
1
vote
1answer
744 views

Update DirectX 11 Texture Created in Unity Asynchronously in the Native (c++) Plugin

Sorry for the long question :D tl;dr version :) Is it possible to update DirectX 11 textures created in Unity asynchronously in a native plugin (C++)? I've written a plugin that retrieves data from ...
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0answers
132 views

Should I bake all textures to a texture atlas in a game level?

I'm writing my own game engine using Java/OpenGL. I'm creating levels in Blender 3D and exporting them in a custom file format. I'm not going to be auto-generating any terrain - everything is going ...
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0answers
28 views

Create texture atlas from loaded textures - OpenGL LWJGL Java [duplicate]

In my program I have objects with different textures, that are in the same vbo. I cant have an array of samplers in my shaderprogram, so i have to use a texture atlas. I have seen some ways to make a ...
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2answers
107 views

How do 3d engines add textures to objects?

I was wondering how 3d engines like Unity or OpenGL added textures to objects. Example: How would Unity add this texture to the side the arrow is pointing to?
2
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1answer
492 views

Generating mipmaps for volume texture

Does texconv from DirectxTex support generating mipmaps for volume textures? If not what are the other alternatives? I am asking because I have tried to create the mipmaps by using textconv.exe -m 3 ...
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1answer
249 views

Problem with ID3D11DeviceContext::CopyResource method - How to properly read a texture CPU-side?

I am trying to make a full copy from a render target texture to a staging one but it seems my data length ends up being only 4 in length instead of 921600 (1280 * 720). Here is my textures ...
4
votes
1answer
232 views

Creating rectangles from the inner part of a texture2D

This may be hard to understand, but I'll do my best. You will see that the first image is a normal Mario, and the other is the result I am looking for. I'm trying to find a way to extract ...
0
votes
1answer
124 views

Is there anyway I can make a plane visible from both sides?

In Unity i have a model of a tree with leaves made of a plane and a texture, when I upload it to unity the texture is only visible on one side so how can I change it to be visible from both sides ...
6
votes
4answers
5k views

Can't understand these UV texture coordinates (range is NOT 0.0 to 1.0)

I am trying to draw a simple 3D object generated by Google SketchUp 8 Pro onto my WebGL app, the model is a simple cylinder. I opened the exported file and copied the vertices positions, indices, ...
0
votes
1answer
3k views

Rendering Texture Quad to Screen or FBO (OpenGL ES)

I need to render the texture on the iOS device's screen or a render-to-texture frame buffer object. But it does not show any texture. It's all black. (I am loading texture with image myself for ...
31
votes
5answers
22k views

How to avoid texture bleeding in a texture atlas?

In my game there is a Minecraft-like terrain made out of cubes. I generate a vertex buffer from the voxel data and use a texture atlas for looks of different blocks: The problem is that the texture ...
0
votes
1answer
31 views

problems with imported texture

I have done a texture in GIMP and imported it in Unity but for some reason the texture appears to be squashed in the sides. Image done in gimp: And here is what happens in Unity:
2
votes
2answers
491 views

How do I use transparent textures in panda3d?

I need to map a partially transparent texture on a flat quad with panda3d. With the quad as a canvas I'd like to create something like sprites positioned in the 3d coordinate system. I wanted to ...
1
vote
1answer
40 views

LWJGL not streching texture to quad

I'm having problems with texturing in LWJGL. The texture is not being stretched to a quad. As you can see, the texture is not being sized to the quad, marked with pink border. The problem doesn't ...
1
vote
1answer
174 views

Rendering Performance: num Draw Calls == num Texture Bindings

I'm making a game with Libgdx 1.6.4 and experience some lag issues on iPhone 4 and then discovered: // in the constructor GLProfiler.enable(); ... // in the render method Gdx.app.debug("draw calls:...
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votes
2answers
829 views

How do I generate a mipmap for a texture loaded from a stream?

I am loading a Texture2d from a stream: public static Texture2D GetTexture(GraphicsDevice dev, System.Drawing.Bitmap bmp) { Texture2D texture; using (MemoryStream s = new MemoryStream()) {...
0
votes
1answer
378 views

Applying texture to a 3D object

I am trying to draw a 3D cube on the screen, using MonoGame. The cube was created in Blender and exported as an fbx file. The following is what the cube looks like in VS when opened in the editor: ...
2
votes
1answer
76 views

WebGL - send part of texture to GPU

I have a matrix of pixels in RAM memory, e.g. 1000x1000 pixels. I send it to GPU using gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1000,1000, 0, gl.RGBA, gl.UNSIGNED_BYTE, pixels); Which works great. ...
0
votes
1answer
48 views

Ray tracing - texture and phong lighting

Other questione releated to my ray tracer implementation for iPad. If I have a polygon that has a texture and a material, how do I calculate the color using Phong lighting model? Is the texture used ...
32
votes
5answers
19k views

Should I use textures not sized to a power of 2?

In the early days of OpenGL and DirectX, texture sizes were required to be powers of two. This meant interpolation of float values could be done very quickly, using shifting and such. Since OpenGL 2....
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vote
1answer
183 views

Cubemaps turn black OpenGL GLSL Java LWJGL

Recently I tried to add cubemaps to my 3D-rendering engine. The objects with a cubemap now turn completely black. This is how I load my cubemap: public static int loadCubeMap(String filename) { ...
0
votes
1answer
361 views

Render Queue Sorting, HOW?

Recently I'm trying to implement a render queue sorting system, i.e., ordering my renderable objects in an array in such a way that the overhead of OpenGL state changes are minumum. After some ...
0
votes
0answers
28 views

Resolution of textures in OpenGL [duplicate]

I load texture from PNG file and render their using OpenGL. But I found the manual, what texture resolution must be divisible by a power of two. If I use a texture with a resolution of 800x600 pixels, ...
13
votes
1answer
8k views

Max texture size Android : which settings for 2048x2048?

I want to use a texture atlas of 2048 x 2048 in my game, and I would like to warn the users with a "too low" device to not download the game. With a texture atlas of this size, what requirements ...
2
votes
1answer
903 views

Unity3d change texture on terrain at specific vector3 at runtime

I need the terrain texture to change at certain positions depending on where trees etc. are randomly positioned at runtime. I'm struggling to find any solid information about how to take a particular ...
1
vote
2answers
337 views

Fading in and fading out animations

This is how I'm creating my player. Is there any way to start fading in and fading out for an amount of time when I get hit? private Texture tex = Game.res.getTexture("player"); public Player(Body ...
2
votes
1answer
531 views

Trying to extract file icons and use as a sprite texture

I'm trying to extract file icons from the files inside a folder (eg: Program Files), and have them set as my Sprite's texture. I extracted the file icons, converted them to Bitmaps and then to byte ...
1
vote
3answers
2k views

How to implement Index Buffer Object (IBOs) with texture coordinates in OpenGL?

I was using IBOs to render meshes (for example a cube) from wave-front files (.obj), without texture coordinates or normals, in OpenGL. Following this, I attempted to implemented texturing. The mesh ...
0
votes
1answer
622 views

Unity3d iOS build - where are the textures?

First time building and running my Unity3D app on my iPhone and it appears that all the textures are missing. Everything is just a solid block of whatever color I made it. When running in Unity I ...
0
votes
1answer
77 views

Sprites not showing (C# - XNA 4.0)

I'm following a tutorial from XNA GPA, but in my project, none of the sprites are loading. I've followed all of the instructions exactly, and the code works as expected when I copy it from my project ...
0
votes
0answers
25 views

How do I generated cubic UV coordinates for a mesh?

I'm trying to add a utility function to my game engine that generates cubic texture coordinates for a specified mesh. I've attempted to come up with my own algorithm but I can't get it to work ...
0
votes
1answer
57 views

Best approach for level specific textures

TL;DR: Best way to handle level-specific textures without overkilling memory usage and killing performance and keeping things clean in OpenGL for mobile (also lower-end devices) and desktop using ...
6
votes
1answer
300 views

Why does flipping 1 texture region cause an identical texture region to also be flipped? (libGDX)

Sorry for the bad title. I didn't know how else to explain it. The following is a portion of my code: public class AssetLoader { public static TextureAtlas spriteSheet; public static ...
1
vote
0answers
52 views

Texture shader using model's texture

I'm trying to get a model rendered in monogame using a texture shader. I'm using the code from this tutorial project: http://kgiannakakis.github.io/MonoGameEffects/ I created a simple textured cube ...
0
votes
1answer
66 views

XNA Texture mapping on model

I have a cube as my model and want to map a texture on every side of the cube. I have been searching for a while and most answers suggest using 3D max or using VertexPositionTextures. I am not ...
0
votes
3answers
42 views

Capturing small details in textures without making a huge map

Ex. Nuts and bolts on a cabinet. Said items are tiny relative to the cabinet, and on a texture map looks like an indistinguishable dot. Is it worth it to separate these tiny details into a mesh of ...
3
votes
1answer
803 views

Can Unity support / use textures that are not square?

I have been told by another highly skilled Unity artist that Unity cannot efficiently handle non square images. Since that doesn't sound right to me, I wanted to get a second or third confirmation to ...
0
votes
1answer
114 views

Achieving Retro Resolution with HD

I couldn't really find any tips on this (or perhaps I just lack the proper words once again), but I'm thinking about how to get some retro looks (SNES 16 Bit, specifially) using a modern system. ...
1
vote
0answers
51 views

Guidelines to create textures for materials in Unity3d

I'm facing a problem with realizing particle systems. Following many tutorials including the recent live session everything end up assigning materials to particle to get custom shape ones. What I'm ...
0
votes
1answer
160 views

OpenGL texture seams

I'm atempting to make a game using OpenGL. So far I have loaded an .obj model, and I have generated a terrain as well as a very simple UI. My issue is that it 'seams' (tihi : P) that there are some ...
4
votes
1answer
150 views

How do I check for collision between transparent textures?

I am creating a 2D game using OpenGL. For sprites, I use textured quads (actually two triangles). The texures contain transparent pixels, since objects are not always perfectly rectangular. How do I ...
4
votes
2answers
3k views

Getting a pixel of Sprite at the cursor position in Unity

Summary: I've been trying to figure out a way to use simple box colliders as a nice and efficient "first pass" collider. For the "second pass", I want to check that the area clicked has an alpha value ...
0
votes
1answer
931 views

How can I set up a pixel-perfect camera using OpenGL and orthographic projection?

I am creating a 2D game using OpenGL and orthographic projection. For sprites, I use textured quads (actually two triangles). I want the pixel art textures for the sprites to be displayed in a ...